package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Value("${sky.shop.address}")
    private String shopAddress;
    @Value("${sky.baidu.ak}")
    private String ak;
    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional   //事务回滚
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、超出配送范围、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收获地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail());

        long userId= BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList==null||shoppingCartList.size()==0){
            throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        //向订单表插入一条数据
        orderMapper.insert(order);

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));

        //return vo;
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
//        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
//        Integer OrderPaidStatus = Orders.PAID; //支付状态，已支付
//        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单
//        //发现没有将支付时间 check_out属性赋值，所以在这里更新
//        LocalDateTime check_out_time = LocalDateTime.now();
//        String orderNumber = ordersPaymentDTO.getOrderNumber();
//        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orderNumber);
        paySuccess(ordersPaymentDTO.getOrderNumber());

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //清空购物车数据
        shoppingCartMapper.deleteByUserId(userId);
//        约定服务端发送给客户端浏览器的数据格式为JSON，字段包括：type，orderId，content
//        type 为消息类型，1为来单提醒 2为客户催单
//        orderId 为订单id
//        content 为消息内容
        Map map = new HashMap();
        map.put("type",1);    //消息类型，1表示来单提醒，2表示客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号："+ordersDB.getNumber());

        //通过websocket实现来单提醒，向客户端推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 历史订单
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult CheckHistory(int page, int pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(page,pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> pageInfo = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        //查询订单明细，并封装入OrderVO进行响应
        if(pageInfo!=null&&pageInfo.getTotal()>0){
            for (Orders orders : pageInfo) {
                long orderId = orders.getId();   //订单id

                //查询订单明细
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);
            }
        }
        return new PageResult(pageInfo.getTotal(),list);
    }

    /**
     * 查看订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        Orders order=orderMapper.getById(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(order,orderVO);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    @Override
    public void cancelOrder(long id) {
        Orders order = orderMapper.getById(id);

        //检验订单是否存在
        if (order==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if(order.getStatus()>2){
            throw new OrderBusinessException((MessageConstant.ORDER_STATUS_ERROR));
        }

        //订单处于待接单状态下取消，需要进行退款
        if(order.getStatus().equals(Orders.TO_BE_CONFIRMED)){
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    order.getNumber(), //商户订单号
//                    order.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            order.setPayStatus(Orders.REFUND);
        }

        order.setCancelReason("用户取消");
        order.setCancelTime(LocalDateTime.now());

        //将该订单的状态设置为已取消
        order.setStatus(order.CANCELLED);
        //更新数据库
        orderMapper.update(order);
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void getOrder(long id) {
        //查询该订单的详细菜品数据
        List<OrderDetail> orderDetails=orderDetailMapper.getByOrderId(id);
        for (OrderDetail orderDetail : orderDetails) {
            //构造需要插入的单条购物车商品数据
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail,shoppingCart);
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(),orderVOList);
    }

    /**
     * 统计订单信息
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        OrderStatisticsVO orderStatisticsVO =orderMapper.getStatistics();
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirmOrder(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * 业务规则：
     * * 取消订单其实就是将订单状态修改为“已取消”
     * * 商家取消订单时需要指定取消原因
     * * 商家取消订单时，如果用户已经完成了支付，需要为用户退款
     * @param ordersRejectionDTO
     */
    @Override
    public void rejectOrder(OrdersRejectionDTO ordersRejectionDTO) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        //订单只有存在且状态为2（待接单）才可以拒单
        if(ordersDB==null||!ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
            //并修改状态为退款
            ordersDB.setPayStatus(Orders.REFUND);
        }

        ordersDB.setStatus(Orders.CANCELLED);
        ordersDB.setCancelReason(ordersRejectionDTO.getRejectionReason());
        ordersDB.setCancelTime(LocalDateTime.now());
        orderMapper.update(ordersDB);
    }

    /**
     * 商家取消订单
     * 6. 取消订单
     * 6.1 待付款、待派送、派送中、已完成状态可以进行取消操作，进行取消操作需要选择取消原因。
     * 6.2 取消原因包括：
     * 订单量较多，暂时无法完成
     * 菜品已销售完，暂时无法完成
     * 骑手不足无法配送
     * 客户电话取消
     * 自定义原因，增加自定义原因输入框，限制20字以内。
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());
        //订单状态为待接单或已取消状态，不能取消
        if(orders.getStatus().equals(Orders.TO_BE_CONFIRMED)||orders.getStatus().equals(Orders.CANCELLED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = orders.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
            //并修改状态为退款
            orders.setPayStatus(Orders.REFUND);
        }
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void deliveryOrder(long id) {
        Orders orders = orderMapper.getById(id);
        //如果不为状态3的话，就不能派送订单
        if(!orders.getStatus().equals(Orders.CONFIRMED)||orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders build = Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(build);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void completeOrder(long id) {
        Orders orders = orderMapper.getById(id);
        //如果不为状态4的话，就不能完成订单
        if(!orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)||orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders build = Orders.builder()
                .id(id)
                .status(Orders.COMPLETED)
                .build();
        orderMapper.update(build);
    }

    /**
     * 用户催单
     * @param id
     */
    @Override
    public void reminder(long id) {
        //查询订单是否存在
        Orders orders = orderMapper.getById(id);
        if(orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //基于websocket实现催单
        Map map = new HashMap();
        map.put("type",2);    //2代表用户催单
        map.put("orderId",id);
        map.put("content","订单号："+orders.getNumber()+"用户催单");
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList = page.getResult();
        if(!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList) {
                //将公共字段复制到VO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes=getOrderDishesStr(orders);
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        StringBuilder sb = new StringBuilder();
        for (OrderDetail orderDetail : orderDetailList) {
            String orderDish = orderDetail.getName() + "*" + orderDetail.getNumber() + ";";
            sb.append(orderDish);
        }
        return sb.toString();
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }


}
